A 37.7 g. piece of an unknown metal is heated up 43.5 °C when given 1,095.4 J of heat. What is the specific heat capacity of the metal?

(no3)⁻n has oxidation number x,o has oxidation number -2.(x*1 -2*3) charge of the nitrate ion, and we know that charge of the nitrate ion =-1.so,(x*1 -2*3) =-1x-6=-1x=+5answer a. +5.

The mole ratio of hydrogen to ammonia is 3: 2.

Remember that rust prevented by placing a sacrificial electrode in electrical contact with the iron. the sacrificial electrode must be composed of a metal that  oxidizes  more easily than iron (that is, it must be below iron in table 18.1).

Ithink b not to sure hope that : )